Drying press



p 26, 1933. c. E. BECKER 1,928,087

DRYING PRES S Filed May 18, 1931 l N VEN TOR fiarli. Be ck'er A TTORNEY Patented Sept. 26, 1933 UNITED STATES P'A'l" 5 Claims.

This invention relates to an improved press for use particularly inthe manufacture of artificial teeth although in its broader aspects the press may be used in the production and primary heat treatment of various products made from ceramic materials. I I

It is a primary object of the present invention to provide a multiple press capable of simultaneously holding in rigidly assembled clamped relationship a plurality of toothforming molds, wherein each of the molds includes a plurality of separable sections. j I

It is another object of the. invention to provide a press of this character wherein the molds when situated between the clamping members of the press and in assembled relationship, are subjected to a sufficient degree of heat toeffect an initial heat treatment of the articles mold With these and other objects in View, whichv rill' appear as the description proceeds, the invention consists in the novel features of construction, combinations ofelements and arrangement of parts hereinafter to be more fully described and pointed out in the appended claims.

In the accompanying drawing: Y

Figure 1 is a front elevation of the mold press formed in accordance with the features of the present invention,

Figure 2 is avertical transverse sectional view. taken on the line 2-2 of Figure 1-.

Referring to the drawing by reference characters, the numeral 1 designates my improved press in its entirety. In this instance the press is formed to comprise a supporting bed 2, arranged in a horizontal plane and disposed at' a suitable elevation by means of leg members 3. Suitably secured to the upper surface of the bed 2 is the base section 4 of the press, and arising from the' base section 4 are spaced vertical sides 5; A top plate 6 rests upon the upper surfaces of the sides 5 and is rigidly secured thereto by the fastening devices '7. The baseplate is formed to include. a plurality of longitudinally extending substantially V-shaped grooves 8. Each of these grooves is formed. to comprise downwardly converging inclined sides 9 and a substantially flat horizontal bottom surface 10. The formation of the grooves 8 is such as to admit of the reception therein of the lower sections of a pluralityof tooth forming molds 11. Thesemoldsare preferably of the construction and type disclosed in'my copending application Serial 'No.'279,226 filed May 21, 1928 now Patent Numberl,8}i6,012 and where-' in ,each'mold includes a pair of complemental low;

er sections indicated at 12 and13 which have their'outer walls inclined and shaped-to correspond with the wall formation of the grooves 8. .Also, each mold includes an upper section 14, provided with inclined side Walls 15 which engage correspondingly inclinedj walls 16 provided in longitudinally extending grooves 17 formed in connection with movable-press sections 18, here:

inafter termed platens. When the platens are forced downwardly intoengagement with the 11131;

per portions of the jmold -sections, as shown in Figure. 1, forces are applied to the'separable mold sections whereby each mold is firmly'secured in w an operating position, preventing .any'frelative movement between the'sections of each mold.

To effect the vertical movement of the platens into and outfof mold engaging positions I employ a rod 19 which has its ends mounted in the sides 5. Rotatably journaled on this rod' area plurality of operating levers 20, one of said levers being. provided for each independently removable platen. Pivotally connected with an intermediate portion of each lever 20 is a link 21,,W'hich has its opposite end connected with a pivot 22 uniting the adjoining ends of a pair of upper and lower t ggle linksj23. The lower of the links 23 is pivotally connected as1at24 with an eye 25 formed with the. upper surface j of 'thecomplemental' platen, whereas the upper end of the upper link 23 of each-platen is pivotally connected asat '26 with a bolt 27. .Each of these boltsis provided with a collar 28 against which rests the lower. end of .a coil spring 29,'the upper end ofeach of these springs engaging with the'upper surface of the top plate 6, while the extreme upper end of the bolt 27 is provided with a nut 30 which is engageable with the upper surface of the top plate 6. With the operating lever in the position disclosed in Figure 2,Vthe spring '29, under com pression, forces its platen downwardly into pressing engagement withamold section, and the spring 29 operates tohold the toggles in their.

relative aligned position to fmaintain the pressure on the mold. Of course, otherequivalentv mechanism may be employed for applying pressure to the molds but themechanism set forth is preferred in thatit is quickto operate and saves the operators time. as compared with smaller structures, such as the screw operatecl typevset forth in my aforesaid application. A-stOD Strip 31' is secured :to therear side edges, of'the .walls -5 7 and 32 act as guides and. govern the vertical 40 This permits of the substantially immediate sepatravel of the platens. Also, the strip 31 operates as a stop means to limit the rearward position of the molds in the grooves of the press.

The bed 2 and the base section 4 are provided with registering openings 33 and arranged in line with these openings are gas burners or their equivalents 34, which direct the flame uponthe molds arranged in the press, whereby said molds and the ceramic articles contained therein, may be heated to a desired temperature simultaneously with the pressing operation.

In conjunction with this struc turethere is provided a filling table 35. This filling table is of hollow formation and throughwhich 'a liquid teeth are formed. "The mold sections are then assembled and advanced into the press between the base section 4 and the movable platens. The

platens are then lowered and brought into clamping andfpressing engagement with the molds, holding the latter rigidly againstseparation or relative displacement. While in the press the moldsfand the ceramic articles contained therein are subjected'to the heat of'the burners 34 in order todry the teeth or otherceramic articles" andred'uce the same to a dry semipermanent form. When pressed for the proper time the platens are elevated and the molds removed and positionedin the grooves 38 of the filling table. Since this filling table is liquid cooled the heat of the molds is rapidly dissipated so that they material to an underlying receptacle 41.

may be. conveniently handled by the operator.

ration of the mold sections to effect the removal of the molded teeth and also to permit of the refilling of the molds prior to their subsequent insertion into the press; Any surplusmaterial which may be present on the molds when the latter are initially assembled drops into the out' let space 39 formed between the base section 4 and the filling table 35. A chute 40 registers with the outlet space and drops the surplus ceramic I preferably provide a plurality of platens which are under the control of a single operator, so that the latter may without loss of time or waste mo-- tion successively insert or remove molds into and from thepress and yet permit'each mold to remain in the press for the required length of time necessary to initially bake, dry or form the ceramic articles to a desired condition.

y While I have described what I consider to be the preferred form of my improved press, nevertheless it will be appreciated by those skilled in the art that the form of the invention herein de5 scribed and illustrated exemplifies but one form of myinvention and is'subjected to considerable variation and modification without departing from the scope of the invention.

What is claimed is: 1. A drying press for, manufacturing artificial teeth comprising astationary-base section hav-' ing a plurality of parallel longitudinally extending grooves, a plurality of selectively. movable press sections cooperative with said base section and provided with grooves registering with the grooves in the base section, said grooves being adapted to receive tooth forming molds, means for heating the molds clamped between said press sections, a filling table arranged laterally of said base sections and in a horizontal plane thereof, said filling table being provided with'grooves registering with the grooves in the base section,

in'g grooves, a plurality of selectively movable press sections cooperative with said base section and provided with grooves registering with I the grooves in the base section, said grooves being adapted to receive tooth forming moldsjmeans for heating the molds clamped between said press sections, a filling table arranged laterally of said base sections and in a horizontal plane thereof, said filling table being provided with grooves registering with the grooves in the base section, means for passing a liquid i cooling means through channels formed "in said filling table, saidfilling 'table being spaced from said base section to provide a debris removing slot between. 3. Apparatus for manufacturing artificial teeth comprising a press structure, means for heating molds positioned in said press structure, and a filling table arranged adjacent to said press structure and provided with means for passing a liquid cooling medium therethroughi, pApparatus for moldingartifici'al teeth comprising, in combination, a press provided with relatively movable members having registering mold receiving ways formed in the opposing surfaces thereof, said ways serving to retain the parts of a sectional tooth forming moldinregistering relationship when said fmold is under compression between the movable members of the press, a substantially horizontal work table.

arranged laterally of said press members on at least one sidethereof, said table being provided with mold receiving ways disposed in longitudinal alignment with the ways of said press mem-;

bers,-means for positively heating, the molds clamped between said press members, and means for passing a cooling fluid through passages formed in said table to eifect and accelerate cooling of the molds positioned in the table ways.

5. ripparatus for molding artificial teeth cornprising, in combination, a press provided with relatively movable members having registering mold receiving ways formed with the opposing surfaces thereof, said ways serving to retainthe parts of a sectional-tooth forming mold in reg- V istering relationship when said mold is under compression between the movable members of the press; a substantially horizontal work table arranged laterally of said press members on at least one side of said press, said table being provided with mold receivingways disposcdin lon-- gitudinal alignment with the corresponding ways. of said press members, means for positively heating the molds clamped between said press members, means for effecting a positive cooling of the. molds when positioned on the waysof the work table andremoved from the region of heat and K compression provided by the press members, and an outlet for surplus molding material disposed between said press members and table.

' a CARL E. BECKER. 

